I'm new member. Love my 2013 Jaguar XF but may be time to part. I have seen posts on electrical problems fault displays but couldnt locate current thread. So here goes:

Car ran fine till about 110,000 miles when faults showed up--a parade of every fault showed up after driving for 40 miles or so. Took to Coverntry Jaguar in San Diego (first time) and they had it for 2 months and charged me $6000 to amoung other itens replace the rear module B computer in the boot/trunk. Coventry brought it to Dealer and I think Dealer installed the module B, not sure.

Took possession and fault lights immedatly appeared. Repair unsuccessful. Been driving prevariously for a few months. If drive too long will get stuck in drive. Can stop and restart and faults go away and drives perfetly till faults eventually show up.

My sense is the transmission module needs replacment, suspect they replaced wrong computer. Cost to replace transmision modle is alot and doubtful of value. Question the legal right of car manufacture to charge such exhorbant prices for replacment parts. Doesn't seem right.

 

I had several replies to my post and now they are gone. Are post deleted after certain time? There were some good comments and I wanted to thank authors but got busy and now can't locate.

 

Hi lloydsoflondon,

Posts are not deleted. Is it possible that you originally posted under a different username?

Cheers,

Don

 

Thanks for the info on posts not deleted. The issue with the faults showing up and all the related problems such as stuck in drive, limp home mode, etc seems to be somewhat common. I mentioned that I spent $6,000 for repairs that did nothing. Someone posted to just drive keep driving, but now I don't see the post. The danger is I am going to get in trouble at some point if the car is stuck in drive and I can't back up. Plus who knows what else might happen. My wife rightly freaks out when the fault lights come on and the warning bell starts ringing -- nerve wracking if you are not used to it.

So I took car to San Diego Jaguar dealer, they replaced the Module B junction box ($3600 for part) when Coverntry Jaguar (who I took the car to for repair in the first instance) brought the car to them when Covernty couldn't figure out how to repair. I will report back when Jaguar dealer advises what the problem is. My guess is another part for over $3000, the transmission module is my sense just based on having driven the car for almost 15 years. Still drives great. I did have to rebuild the suspension about 3 years ago for $5000, shocks were completely shot and drove like a Modle T. In hindsite suppose its not a cheap car to maintain. That's $10k for a car that's worth maybe $10k when not broken.

 

Did you have your battery replaced

 

Without a detailed list of the Diagnostic Trouble Codes, symptoms, and work performed thus far, it would be impossible for us to help you remotely. But obviously, the shop who charged you $6,000.00 owes you a proper repair or a full refund.

Cheers,

Don

 

Thanks much Don B.!
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Thanks for the responses. Today I recived a video inspection of the car from the Jag dealer. The fault codes are caused by oil leaking onto the alternator which affects the voltage. Aside from a dozen other mechanical issues not related to the fault code issue. And replace battery. Whch I replaced a year ago along with auxilary battery.

I paid $6000 to replace the Module B junction box, according to the video that had nothing to do with the fault code issue. The dealer replaced the junction box but my guess is they will claim Coverntry Jaguar told them to make the repair.

I need to hear the cost to repair. the customer rep is going to call me. But my guess it is going to be thousdands of dollars and no guaranty the repair will fix the issue. Customer rep must be mulling over how he can explain the $6k repair before calling me.

 

Dealer called---$3500 for new alternator but can't guaranty it will fix the fault problem. Also rear manifold coolant leak $1500. Aside from essentially a complete engine and suspension rebiled if I did all the repair recommendaitons. Didn't ask cost but got to be over $10,000.

So it seems at my 2013 FX died at 110,000. I am going to pick it up and figure out what to do. Still drives with caviet it might break down any time.

 

For a 2013 car, not under warranty, why are you taking it to a dealer? $3500 for an alternator replacement?!! I live in VA and you could probably have it transported here, me replace it, and transported back and still be less than that! (Not that I'm suggesting that, just making a point). Dealer service has a bad rap for a reason! Nothing you have described thus far could not be handled by a competent independent shop. I've known plenty of dealer mechanics in my day and while not true of all of them. Most are some of the most incompetent know-nothings I have come across. I know far far more independent mechanics. They're far more knowledgeable and competent than the dealer. Dealer is fine if you have warranty. Beyond that. No way in hell.

I mean this in all sincerity but I think maybe they see you as an easy victim pretty much. So it's good you are not going forward with them, but that doesn't mean it's the only option. You also have to realize that many times these dealers and other shops will Jack the price up super high because they really just don't want to work on it. However they will for that price. I say ask around, scour reviews and find a good reputable, independent honest mechanic to give you a diagnosis. Diagnosis fees are pretty cheap. I don't know what that other Jaguar place you were talking about is that isn't the dealership? However I would try someone different than them too.

 

Coventry Jaguar, the repair joint I took car to, will replace alternator for $1000. might take chance and have that done. make sure oil doesn't leak on it and if that repairs the fault problem then car may still have a few miles on her. Don't drive much so looking for a couple of years of use.

 

Sorry to hear of the huge prices. Any way you can DIY any of this?
I am like a broken record but I would have left Jaguar LONG ago if not for DIY and the fantastic amount of information on this list!

One suggestion? I don't know if this is your only car but consider taking your stock alternator off and having it rebuilt? We have a number of threads with after market alternators causing problems. At least with a rebuilt stock one you know it's the correct one for your car. Several guys have also used this as an excuse to up the amp rating. Old forum member Bigg Will did this and had it raised to 250 A!
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This is what I say all the time as well. I love love love Jaguar; however, if you are not in a warranty whether new vehicle or lease, I can't recommend owning one unless it is not your only vehicle and you can DIY most repairs. The more the better. The more you can do then I say have plenty. I have two working on three. Hopefully what's in the next two weeks 😂.

 

tergitkerd
tergitkerd is offline
Senior Member

Agree about dealers. I took the car to independent repair shop Coventry Jaguar, never been there before but they have been in business for many years, and they took it to dealer because they couldn't figure out how to repair. Agree dealers are rip off.

But when the car was still broken after being repaired Coventry said I should take back to dealer and see what they had to say. Think i mentoined the total dealer price for repairs from bumper to bumper is $36,000. Its $3500 for the issue, alternator, I was concerned about. Coventry says it will do it for $1000, so I think I will gamble a $1000 and see if the regulator does the trick.

Looking back agree it could seem I'm an easy mark, but still have my wits after 72 years and think it was a perfect blend of incompetence on part of repair shop any on my part...not sure, don't think gulible correct word because how was I to know what caused the fault issue and Coverntry was incompetent. Maybe false belief that a repair shop was competent. Maybe paying $6000 was bottomline gulible. My thought was it gave me a couple of years of use would be worthwhile.

Now, one could question my intelligence for taking it back to Coventry, the repair shop I called incompetent. But the way I see it bringing car to another shop is asking for further confusion and uncertainty. At least Coventry knows the car and knows what appears to the defect.

Water under the bridge. Final question...is it a reasonable diagnosis that oil dripping on to an alternator would cause the low voltage reading that caused the fault reading and all the related issues such as stuck in drive, limp home mode, etc? Thanks for your interest. Always drove my cars till end of life, usually much more than 110,000 miles.

 

ehough oil in it could disrupt the magnetic field. See that mostly in starters. Alternators spin at high speeds and create a lot of internal heat so oil should be cooked off. If these alternators have brushes then oil can definitely reduce clean contact with the commutator

 

I would pm member nbcat in newport beach and get him involved in any more wrench or diagnostic work

 

When I first heard this I did not think oil in the alternator would cause all the problems that have been posted. But I now I do believe I was wrong as we have had more than a few people have major electrical problems when the cam covers leak oil down and into the alternator.

One other suggestion from seeing others fight this? Try to get your factory alternator rebuilt. Many threads with continuing electrical problems after installing a different alternator. At least your OEM one DID work when the car was built.

Sorry to hear of the shocking prices your being quoted but again and again I post the same thing? If you can't DIY the repairs you will spend a lot of money at dealers and repair shops. What's getting even worse is with the age of your car most Jaguar dealers (at least in the US) won't even work on them anymore!
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Agree its hard to find anyone willing to work on car. The British Garage, the place I have used previusly, didn't want to work on the electrical problem. Gave a vauge excuse.

Replacment parts costs are outrageous. Almost all computer related parts are $3500. Transmission module, the module B in trunk. I looked all over and the price was fixed.

Anyway, I read this Forum from time to time and enjoyed the commentary. Will post the final outcome--did the new alternator fix problem.

 

Well shoot.
wish i could help more but my experience is with the zf6hp26. I am sure yours is different. Did any of the shops give you any codes or document any. Maybe ask them or they may be on a quote or invoice. Especially with computer/module replacement. Those would help immensely. The previous owner of my car used mission viejo jaguar north of you. He was very pleased with them and i have a few of his invoices for work done and they seem to be fair and honest

 

scottjh9 brings up a good point?
Your transmission is a very common ZF 8 speed used in dozens of cars so finding a transmission place should be easy compared to finding a Jaguar service garage?
Might not help with the other problems but at least you could determine if you need a TCM replacement or not?
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